Laddi Technology

14/08/2021

4 molecular perovskite high-energetic materials, (H2dabco)M(ClO4)3 (M = Na+, K+, Rb+, and NH4+ for DAP-1, DAP-2, DAP-3, and DAP-4, respectively) [32], [33], [34]. In addition, we also briefly investigated the influence of A-site fuel cations on the oxygen balance (OB) with another two metal-containing perovskite compounds (H2pz)Na(ClO4)3 (H2pz2+ = piperazine-1,4-diium; PAP-1) and (H2dabco-O)K(ClO4)3 (H2dabco-O2+ = 1-hydroxy-1,4-diazabicyclo[2.2.2]-octane-1,4-diium; DAP-O2) [35]. Among these six members, DAP-4.

11/08/2021

Formulation of transition metal cations with strong oxidizing properties (cobalt, manganese) leads to a decomposition in one step, with crystallization occurring at a relatively low temperature.

01/08/2021

Energetic perovskite precursors are dissolved in a solvent called NMP and coated onto a substrate. Then, instead of heating, the substrate is bathed in diethyl ether (DEE), a second solvent that selectively grabs the NMP solvent and whisks it away. What's left is an ultra-smooth film of perovskite crystals.

29/07/2021

Perovskite materials used in solar cells are a kind of organic-inorganic metal halide compound with the perovskite structure, in which Group A (methylammonium, CH3, MA+, or formamidinium, , FA+) is located in the vertex of the face-centred cubic lattice, and the metal cation B (Pb2+, Sn2+, etc.) and halogen anion X (Cl-, Br-, or I-, or a coexistence of several halogens) occupy the core and apex of the octahedra, respectively. The metal-halogen octahedra are joined together to form a stable three-dimensional network structure. The crystal structure.

26/07/2021

11 metal-containing members and 9 metal-free members; or 18 perchlorates and 2 nitrates; or 16 members in cubic-type structure and 4 members in hexagonal-type structure.

20/07/2021

14/07/2021

molecular perovskite energetic materials, here we report five new metal-free members, (H2A)[NH4(ClO4)3], by using different organic cations H2A2+, i.e., 1-hydroxy-1,4-diazabicyclo[2.2.2]octane-1,4-diium for DAP-O4, piperazine-1,4-diium for PAP-4, 1-methyl-piperazine-1,4-diium for PAP-M4, homopiperazine-1,4-diium for PAP-H4, and 1-methyl-1,4-diazabicyclo-[2.2.2]octane-1,4-diium for DAP-M4, respectively. Together with the previously reported member, (H2dabco)[NH4(ClO4)3] (DAP-4, H2dabco2+ = 1,4-diazabicyclo[2.2.2]octane-1,4-diium), these six metal-free molecular perovskite high-energetic materials provide nice instances to fine-tune the oxygen balance, crystal density, thermal stability, and detonation performance, by changing the A-site organic cations solely.